Exercise increases information content and affects long-term stability of hippocampal place codes

Yoav Rechavi, Alon Rubin, Ofer Yizhar, Yaniv Ziv

Research output: Contribution to journalArticlepeer-review

Abstract

Physical exercise is known to augment brain functioning, improving memory and cognition. However, while some of the physiological effects of physical activity on the brain are known, little is known about its effects on the neural code. Using calcium imaging in freely behaving mice, we study how voluntary exercise affects the quality and long-term stability of hippocampal place codes. We find that running accelerates the emergence of a more informative spatial code in novel environments and increases code stability over days and weeks. Paradoxically, although runners demonstrated an overall more stable place code than their sedentary peers, their place code changed faster when controlling for code quality level. A model-based simulation shows that the combination of improved code quality and faster representational drift in runners, but neither of these effects alone, could account for our results. Thus, exercise may enhance hippocampal function via a more informative and dynamic place code.
Original languageEnglish
Article number111695
Number of pages11
JournalCell reports (Cambridge)
Volume41
Issue number8
DOIs
StatePublished - 22 Nov 2022

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